Equipment is NOMINALLY rated
at AHRI conditions,
You MUST adjust your choice to where you live and
to the conditions you PICKED in your load calculation.
ACCA calls this
" Manual S ".
WHY IS IT
But in cases where there will not be an objection to the average 2.31% average error in results, Off-theCharts offers no fumbling around with product data book numbers! AHRI already tested the machines, just use their accurate numbers and let your computer do the math.
WHY HAVE WE BEEN DOING THIS PROCESS BACKWARDS UP TO NOW?
"Off-the-Charts" to do it quickly.
The math is complex but not bogus.
We found any AHRI value might be extrapolated back to a constant, "r", (which might represent near zero entropy output). This is done by our four new formulas working on outside air, indoor DB, WB, and indoor CFM. But like the bubble illustrated above (changing a value by the four x,y,z, and line curve dimensions), the new design conditions can then be applied to the formulas in reverse to bring us to the new stated capacity values!
(Please check Compliance Page for ICC, AHRI, ACCA info.)